Belt-shifter



J. JUREVICH.

BELT SHIFTER.

APPLICATION FILED AUG-15.1917.

1 ,333 ,256. Patented Mar. 9, 1920.

2 SHEETS-SHEET I.

IN W? N TOR film farm 1'02 7 J. JUREVICH.

' BELT SHlFTERf APPLICATION FILED AUG.I5, 1917.

1,333,256. Patented Mar. 9, 1920.,

2 SHEETS-SHEET 2.

u i g E 1 i I z I 15 it Q Mu 14 IN VE N TOR ///ATTORNEY By WWW JOHN JUREvIcH,; or NEw YORK, inst, ixssisivon or ONE-HALE To ensure X. 6mm,

' OFNEW YORK, N. Y...

BELT-SHIFTER.

vImprovements in Belt-Shifters, of which the following is a specification. w This invention relates to improvements in belt slufters n which it is desirable to ob tain a'variety ofspeeds relative to that. of the main driver and also means for-keeping the belt in a normally taut condition.

One object is to provide means combined with such belt shifters through which a cone pulley may be driven by frictional contact with ,the driving pulley. Anotherobj ect is to start or stop .the pulleys instantaneously and also to, shift the belt from one of the cones to another in anexpeditious and. safe mannen: a 7

These andother like objects are attained by the novel construction and combination of parts hereinafter described and shown in the accompanying drawings, forming a material part of this disclosure, and in Fig. 5 is a sectional View, taken on line 55 of Fig. 1. I

Fig. 6 is a detailview of the belt shifting lever.

The belt shifter comprises: a relatively thick plate 10 to which at'its' ends are at tached feet 11, provided with openings to. receive suitable securing means, while 0p posite to the feet are raised lugs 12, acting as bearings for' the longitudinally disposed screw 15, the same extending through the bearings at oneend and having secured upon it an operating handle 16.

Formed in the longitudinal edges of the plate 10, are slots 14, which are slidably engaged the inturned edges 16 of a vertical bracket element 18, the same having an integrally formed rib 19, in which is oper- I .1 Sp'ecificationcf Iietters If atent. I Patented Application filed Aug'ust 15, 1917. .js riai No. 186,325.

are. 9, 1920;

ati'vely engaged the screw 15,-by means of i which it is moved longitudinally of the plate 10, the clip 20 entering the oppositely formed slot sons to hold the bracket .in intimate relation with the plate. pThepbraclzet plate 18 terminates at its extreme end iii ahub 22, in which is rigidly secured a stud 24 by mean'sof'the collar 25 and-a clamp or' look nut 26 at its outer end.

"Passing radially'intothehub isan oil cup 27,"1ts open lower end communicating with I. an oil passage28 in the shaft24, thesame being drilled through'at its'inner end conducting the "oil through-transverse channels 29' into the hub 30, of a driving pulley 31,

mounted to freely rotateupon the end of'the' shaft'24, against the collar? 25.

' Freely rotatable uponthe hub 30 is a cone pulley 32, having a plurality of annular grooves33, 34, and respectively, t0 re ceive the belt 36 and providedv with an extending hub 37 at one end while in the larger end is inserted an annular ring 38 of 7 some material, as leather, adapted to make contact Withthe similar driving ring 40 inserted in the adjacent surface of the driving pulley 31, so that when the two are in intimatecontact, the cone may be driven.

Rigidly secured to the bracket plate 18, are brackets 42 and 43, the former extending outward for'some distance and having pivotally secured at its outer end, by the pin 44', a lever 45 in the outerend of which is attached a cord 46 by means of which it, i

may be drawn downward, the opposite end 47 of the lever 45, being downturned and carries a brake COHtttClLPlBCG 48, adapted to engage within the belt groove of the driving pulley.

j A downwadly extending'arm 50, formed withthe lever 45, is provided with a toothi like point 52, adapted to engage within a depression 53 formed in the end of the hub 37, and by means of whichboth of the pulleys are held in operative position upon the shaft 24, the arrangement being such that it is possible by pullin'g the cord 46 downward, to press the cone pulley 32 so as. to cause engagement between the rings 38 and 40 thereby transmitting rotary motion from the driving pulley to the cone pulley.

In order to move the belt from one step of the. cone pulley to the other, a horizontally extending arm 54, secured to the lever 45, has pivot-ally engaged with it a bracket:

55 turned at right angles, the lower angular clement acting as'a seat upon which is pivotfork 58 at the other, the same being engageable with the belt 36 and by means of which it may be shifted inan obvious manner, the

bracket 55 pivoting so as to allow the shifting lever to be operated in one direction while the lever itself is pivoted. on the pin 59 to the bracket in such manner as to allow itto be swung laterally, 7

:In operation, the belt shifter having been secured in its proper position relative to the motive power and mechanism, to be driven, if it be desired to stretch the belt, it is easily accomplished by manipulating the handle 16, causing the bracket element 18 to traverse the fixed plate 10. h,

lVhen it is required to transmit power to the belt running over the cone pulley 32, the

cord i6 is pulled, forcing the friction rings 38 and into lntlmateconta-ct and When it isdesired to stop the rotation of the driving pulley 31, the cord 46 is relaxed, allowing the spring 60 to draW the lever l7 If it be desired to shift the belt from one diameter cone to the other, the handle 57'is operated, it being normally held in in0perative position by means oi the pull of the spring 62, one end of which is engaged With the lever near the f0rks,and the other end of the spring secured to the extending arm :63 formed With the lever I claim:

In a belt shifter of the class described, the

' combination 01 an operating lever, a hori zontal arm secured to said lever, a rectangular, tvvo-armed bracket pivotally secured to said arm, a belt shifting lever pivotally secured to the lower angular element oi said bracket, a fork at one end of said lever for engaging abelt, said bracket pivoted to said arm and said belt shifting lever pivoted to saidbracket to allow alateral displacement of said, bracket and an operation of said belt shiftinglever in onedirection, an extension on said lever, a spring engaged at one end with said levernear its fork, and with its other end sion. 7 V

'In testimony whereof I have my signature.

' JOHN fJUREVICH.

secured to said eXten- 

